U.S. Secretary of State Hillary Rodham Clinton expressed hope Saturday that Russia would drop its opposition to a U.S. missile defense system in Europe and accept an offer to cooperate in developing technologies for shooting down hostile weapons.

About 150,000 Poles paid their last respects to Polish President Lech Kaczynski and his wife, Maria, as the couple were interred Sunday among kings, poets and statesmen in the ancient Wawel Cathedral in a ceremony long on tradition but short on world leaders whose travel plans were wrecked by the enormous plume of volcanic ash that blanketed Europe.

Polish investigators have begun examining one of three black boxes from the plane crash that killed the president and 95 other people, after Russian officials said their study of the boxes suggested pilot error was to blame.

Russian investigators suggested human error may have been to blame in the plane crash that killed the Polish president and 95 others, saying Monday that were no technical problems with the Soviet-made plane.

Tens of thousands of Poles softly sang the national anthem and tossed flowers at the hearse carrying the body of President Lech Kaczynski to the presidential palace on Sunday after it was returned from Russia, where he and dozens of political, military and religious leaders were killed in a plane crash.

Katyn, an Oscar-nominated story about one of the great underreported atrocities of the 20th century, is among this week's top picks on DVD. Also new: A documentary about former heavyweight champ Mike Tyson and Hannah Montana: The Movie.